Answer:
Indicator species, organism—often a microorganism or a plant—that serves as a measure of the environmental conditions that exist in a given locale. ... For example, greasewood indicates saline soil; mosses often indicate acid soil. Tubifex worms indicate oxygen-poor and stagnant water unfit to drink.
Answer:
all forms of life are made from cell
I think Subarctic, Ice cap and Tundra.
Hope it helps :)
